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You Are On Multi Choice Question Bank SET 2114
105701. If the distance from a source of light is halved, the intensity will?
(A): also be halved (B): remain the same (C): be doubled (D): be quadrupled
105702. The sun rays falling on a thin film of oil spread over a water surface breaks into different colours. This is due to?
(A): interference (B): polarisation (C): refraction (D): diffraction
105703. The pitch of the voice of women is in general?
(A): marginally lower than that of men (B): much lower than that of men (C): the same as that of men (D): higher than that of men
105704. A common periscope is used to see outside objects above the water surface from inside a submarine. For deflection of light, it uses?
(A): optical fibres (B): inclined plane mirrors (C): total internal refraction (D): total internal reflection
105705. Manufacture of hydrogen bomb involves the principle of?
(A): a controlled chain reaction involving nuclear fission (B): a controlled chain reaction involving nuclear fusion (C): an uncontrolled chain reaction involving nuclear fission (D): an uncontrolled chain reaction involving nuclear fusion
105706. Which of the following elements is present in the highest percentage in living matter?
(A): Carbon (B): Hydrogen (C): Nitrogen (D): Oxygen
105707. Steel-is more elastic than rubber because?
(A): its density is high (B): it is a metal (C): ratio of stress to strain is more (D): ratio of stress to strain is less
105708. Which of the following is based on the process of fusion?
(A): Atom bomb (B): Hydrogen bomb (C): Ordinary bomb (D): Napalm
105709. Hybridisation is?
(A): downward movement of water through soil (B): a process of tilling the land (C): decayed vegetable matter (D): cross-fertilisation between twovarieties
105710. A person born with the inner ear missing?
(A): would not have the Eustachian tube (B): would never be able to hear sound (C): would be able to hear only with an electronic hearing aid (D): could only hear a loud explosion
105711. How can the spherical aberration of a human eye be corrected?
(A): Byusing a cylindrical lens (B): Byusing a plano-convex lens (C): Byusing a thin lens (D): None of the above
105712. Astigmatism (of a human eye) can be removed by using?
(A): concave lens (B): convex lens (C): cylindrical lens (D): prismatic lens
105713. Primary rainbow is formed when light suffers?
(A): two internal refractions before emerging out of the drop (B): one internal refraction before emerging out of the drop (C): no internal refraction (D): either one or two internal refractions before emerging out of the drop
105714. Liquids transmit pressure equally in all directions. This is known as?
(A): Boyle-Pascal's Law (B): Pascal's Law (C): Archimedes Principle (D): None of the above
105715. On sudden cardiac arrest, which of the following is advised as a first step to revive the functioning of human heart?
(A): Mouth-to-mouth resuscitation (B): Giving external cardiac massage (C): Sprinkling water on the face (D): Giving cool water to drink
105716. Escape velocity of a rocket fired from the earth towards the moon is a velocity to get rid of the?
(A): earth's gravitational pull (B): moon's gravitational pull (C): centripetal force due to the earth's rotation (D): pressure of the atmosphere
105717. Which of the following acts as a resistance against disease in the body?
(A): Carbohydrates (B): Red corpuscles (C): Vitamins (D): White corpuscles
105718. The chief purpose of crop rotation is to check the loss of topsoil?
(A): by water erosion (B): by wind erosion (C): by weathering (D): of its mineral content
105719. Mirage observed on a road on hot summer days is a consequence of?
(A): reflection of light (B): polarization (C): diffraction of light (D): refraction oflight
105720. Which of the following in the human body is popularly called the 'Adam's Apple'?
(A): Adrenal (B): Liver (C): Thyroid (D): Thymus
105721. When a moving bus stops suddenly, the passengers are pushed forward because of the?
(A): friction between the earth and the bus (B): friction between the passengers and the earth (C): inertia of the passengers (D): inertia of the bus
105722. An eye defect which usually results from an unequal curvature of the cornea is?
(A): nearsightedness (B): astigmatism (C): colour blindness (D): night blindness
105723. A photo-electric cell converts?
(A): sound energy into electrical energy (B): light energy into electrical energy (C): an electrical signal into sound waves (D): electrical energy into light energy
105724. Which of the following sounds cannot be heard by human ear?
(A): 300 vibrations/sec (B): 1;000 vibrations/sec (C): 10;000 vibrations/sec (D): 30;000 vibrations/sec
105725. Pressure cooker cooks rice faster because?
(A): it always lets the steam escape (B): high pressure crushes the hard covering of rice grains (C): it does not let the heat energy escape easily (D): high pressure raises the boiling point of water
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